About the Disassemble Step Type
Use a Disassemble step to disassemble assembled components from the process assembly model.
A disassembled component is not deleted from the process assembly model, it is just disassembled.
If the first step in a process assembly is a Disassemble step, the entire process assembly is considered a disassembly process by default and a reference model is required. After a reference assembly is selected, all its components are added to the process assembly, and the user is prompted to select a component for the first Disassemble step.